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/*
* Copyright (C) 2015 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.example.android.rs.vr.loaders;
import android.renderscript.Allocation;
import android.renderscript.RenderScript;
import android.renderscript.Type;
import android.util.Log;
import com.example.android.rs.vr.engine.ScriptC_bricked;
import com.example.android.rs.vr.engine.Volume;
import java.io.File;
import java.io.FileInputStream;
import java.nio.MappedByteBuffer;
import java.nio.channels.FileChannel;
import java.util.Arrays;
import java.util.Comparator;
import java.util.HashMap;
import java.util.Properties;
import java.util.Vector;
/**
* Created by hoford on 2/2/15.
*/
public class LoaderRaw {
private static final String LOGTAG = "RawLoader";
/**
* This builds the volume based on a collection of raw image files
* @param rs The Renderscript context
* @param dir The directory containing the raw images
* @param prop property object containing information about the files
* @param listener To provide feedback
* @return The created volume
*/
public static Volume buildRSVolume(final RenderScript rs, File dir, Properties prop,
final VolumeLoader.ProgressListener listener) {
String[] dim = prop.getProperty("dim").split("x");
Volume v = new Volume();
v.mDimx = Integer.parseInt(dim[0]);
v.mDimy = Integer.parseInt(dim[1]);
v.mDimz = Integer.parseInt(dim[2]);
String[] voxeldim = prop.getProperty("voxeldim").split(",");
v.mVoxelDim[0] = Float.parseFloat(voxeldim[0]);
v.mVoxelDim[1] = Float.parseFloat(voxeldim[1]);
v.mVoxelDim[2] = Float.parseFloat(voxeldim[2]);
Float min = Math.min(v.mVoxelDim[0], Math.min(v.mVoxelDim[1], v.mVoxelDim[2]));
v.mVoxelDim[0] /= min;
v.mVoxelDim[1] /= min;
v.mVoxelDim[2] /= min;
listener.progress(0, v.mDimz);
if (v.mDimz < 20) {
return null;
}
Log.v(LOGTAG, "Loading " + dir.getPath());
File[] f = dir.listFiles();
Log.v(LOGTAG, "dir contains " + f.length + " files");
Arrays.sort(f, new Comparator<File>() {
@Override
public int compare(File o1, File o2) {
return Integer.decode(o1.getName()).compareTo(Integer.decode(o2.getName()));
}
});
int count = 0;
final Vector<File> toRun = new Vector<File>();
final HashMap<File, Integer> fileMap = new HashMap<File, Integer>();
for (int i = 0; i < f.length; i++) {
if (f[i].isDirectory()) {
continue;
}
toRun.add(f[i]);
fileMap.put(f[i], count);
count++;
}
v.mDimz = count;
if (listener != null) {
listener.progress(0, v.mDimz);
}
v.mVolumeAllocation = null;
Allocation alloc_slice = null;
ScriptC_bricked scriptC_bricked = new ScriptC_bricked(rs);
FileInputStream inputStream;
String pixel_spacing = null;
String slice1_pos = null;
String slice2_pos = null;
boolean slice_spacing_set = false;
int z = 0;
for (File file : toRun) {
try {
inputStream = new FileInputStream(file);
MappedByteBuffer mbb = inputStream.getChannel().map(FileChannel.MapMode.READ_ONLY,
0, v.mDimy * v.mDimx * 2);
short[] slice = new short[v.mDimy * v.mDimx];
mbb.asShortBuffer().get(slice);
inputStream.close();
mbb = null;
if (v.mVolumeAllocation == null) {
Log.v(LOGTAG, "make Volume " + z);
Type.Builder b = new Type.Builder(rs, android.renderscript.Element.I16(rs));
b.setX(v.mDimx).setY(v.mDimy);
alloc_slice = Allocation.createTyped(rs, b.create(), Allocation.USAGE_SCRIPT);
b.setZ(v.mDimz);
v.mVolumeAllocation = Allocation.createTyped(rs,
b.create(), Allocation.USAGE_SCRIPT);
scriptC_bricked.set_volume(v.mVolumeAllocation);
}
Log.v(LOGTAG, "LOAD SLICE " + z);
int size = v.mDimy * v.mDimx;
alloc_slice.copyFromUnchecked(slice);
scriptC_bricked.set_z(z);
scriptC_bricked.forEach_copy(alloc_slice);
z++;
if (listener != null) {
listener.progress(z, v.mDimz);
}
} catch (Exception e) {
e.printStackTrace();
}
}
rs.finish();
alloc_slice.destroy();
Log.v(LOGTAG,"LOADING DONE ....");
scriptC_bricked.destroy();
return v;
}
}
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